With the new version of Flash plugin, this trick is NO longer required. Enjoy.

PS: To install Flash plugin for multiple browsers, you can simply do by creating symlinks at the {browser path}/plugins directory, for example, here's how I installed FlashPlayer 7 for Linux on Mozilla-1.6 and Firefox:

1. Extract the file install_flash_player_7_linux.tar.gz

$ tar -zxvf install_flash_player_7_linux.tar.gz

2. Create a directory, and copy the plugin files into it:Let's do it as root so we can allow system-wide access of the plugin: